title: Curvature-induced D-band Raman scattering in folded graphene.
abstract: Micro-Raman scattering from folds in single-layer graphene sheets finds a D-band at the fold for both incommensurate and commensurate folding, while the parent single-layer graphene lacks a D-band. A coupled elastic-continuum/tight-binding calculation suggests that this D-band arises from the spatially inhomogeneous curvature around a fold in a graphene sheet. The polarization dependence of the fold-induced D-band further reveals that the inhomogeneous curvature acts as a very smooth, ideal one-dimensional defect along the folding direction.
authors.affiliation: Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Awnish K
authors.initials: AK
authors.lastname: Gupta
authors.forename: Cristiano
authors.initials: C
authors.lastname: Nisoli
authors.forename: Paul E
authors.initials: PE
authors.lastname: Lammert
authors.forename: Vincent H
authors.initials: VH
authors.lastname: Crespi
authors.forename: Peter C
authors.initials: PC
authors.lastname: Eklund
mesh_terms: D006108:Graphite / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D012031:Refractometry; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D006108:Graphite